xbox live에 로그인 할수 없습니다. (I can't sign in to Xbox Live. )

Hey Blessing!

Thanks for taking the time to bring this issue to us! First things first we will need a little more information, what console is being used (Xbox one, Xbox 360)? Keep us posted so we can better assist with this or any other inquiry!

Check your PC's clock. The clock must match the Xbox Live servers for sign-in to be completed. Your date and time settings forSet time automatically must be set to On.

As a final step, try removing the Microsoft account by going to Settings, selectingAccounts and then selecting remove next to the account. Then re-add the account from the account picker when you sign in to the Xbox app.